Unlock instant, AI-driven research and patent intelligence for your innovation.

Ultra-fine grain silver alloy laminar composite and manufacturing method thereof

A technology of layered composite materials and ultra-fine grains, applied in the direction of metal layered products, chemical instruments and methods, lamination, etc., can solve problems such as short circuit, electrical noise, and accelerated material damage, so as to achieve increased service life and durability Improved abrasiveness and wide application

Inactive Publication Date: 2013-04-17
CHONGQING CHUANYI AUTOMATION
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the working process of the DC micro motor, the commutator and the brush slices are in contact with each other and slide relative to each other to realize the transmission of current and keep the motor running; during the working process of the equipment, there is inevitably sliding between the commutator and the brush slices Friction and wear, the resulting wear debris is squeezed between the commutator and the brush, affecting the contact performance of the two, causing large fluctuations in contact resistance, resulting in poor output waveforms and electrical noise, and even serious Causes the arc in the non-commutation period and accelerates the damage of the material; at the same time, the wear debris is welded in the groove of the commutator under the action of the arc in the commutation period, which can easily cause a short circuit and often cause the micro-motor to crash early; moreover, During the electrical contact process, the temperature rise due to mechanical friction and current action will reduce the surface hardness of the material, reduce its hardness and wear resistance, and further aggravate the mechanical wear of the material; Wear resistance is an important means to improve the performance of the commutator and the service life and stability of the micro-motor
[0003] Silver alloy has excellent electrical conductivity and corrosion resistance, so it is the most common and most used sliding electrical contact alloy in commutators; due to the low hardness and melting point of silver, there are obvious deficiencies in wear resistance and arc resistance , can not meet the requirements of the micro-motor commutator, for this reason, those skilled in the art have adopted various methods to improve the performance of silver alloys: at present, by adding Cu, Ni, Zn, Pd, Pt, RE ( Rare earth) and other elements to improve the performance of silver alloy materials have been widely used. These alloy elements can strengthen silver through solid solution, precipitation, etc., improve its hardness and wear resistance, improve aging stability, and thus improve commutation. service stability
However, most of these improvements focus on the improvement of the formulation of silver alloys, but ignore the further in-depth research on existing materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultra-fine grain silver alloy laminar composite and manufacturing method thereof
  • Ultra-fine grain silver alloy laminar composite and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Using water atomization method to prepare AgCuNiCe alloy (the mass percentages of each component are: Cu: 8%, Ni: 0.4%, Ce: 0.15%, Ag: the balance) into AgCuNiCe alloy powder, cooling rate 1.0×10 5 C / s, the AgCuNiCe alloy powder is dried and then sieved with a screen to obtain AgCuNiCe alloy powder with an average particle size of 5μm; after 100Mpa cold isostatic pressing, the ingot is formed, and the ingot product is placed in a pure hydrogen atmosphere. After sintering at 850°C for 2 hours, extrusion is performed at a heating temperature of 600°C and an extrusion ratio of 50. After extrusion, the silver alloy is subjected to a greater amount of rolling deformation at a rolling deformation of 75% and an annealing temperature of 350°C. The next largest deformation rolling and annealing treatment, the AgCuNiCe alloy strip is made. The grain size of the AgCuNiCe alloy strip reaches 1.5μm. Then, the AgCuNiCe alloy is processed by hot-rolling composite process at 6...

Embodiment 2

[0039] Example 2: Using water atomization method to prepare AgCuNiLa alloy (the mass percentages of each component are: Cu: 1%, Ni: 0.5%, La: 0.1%, Ag: balance) into AgCuNiLa alloy powder, cooling rate 1.3×10 5 ℃ / s, the AgCuNiLa alloy powder is dried and then sieved with a screen to obtain AgCuNiLa alloy powder with an average particle size of 4.7μm; the ingot is formed by 60Mpa cold isostatic pressing, and the ingot product is placed in a pure hydrogen atmosphere. After sintering at 700°C for 2.5 hours, extrusion was performed at a heating temperature of 580°C and an extrusion ratio of 55. After extrusion, the silver alloy was subjected to a rolling deformation of 75% and an annealing temperature of 300°C. After several times of large deformation rolling and annealing treatment, AgCuNiLa alloy strip is made. The grain size of AgCuNiLa alloy strip reaches 1.4μm. Then, the AgCuNiLa alloy strip is heated at 630°C and 40% deformation The alloy strip is compounded with the copper a...

Embodiment 3

[0040] Example 3: Using water atomization method to prepare AgCuNiPr alloy (the mass percentages of each component are: Cu: 4%, Ni: 0.1%, Pr: 0.5%, Ag: balance) into AgCuNiPr alloy powder, cooling rate 1.6×10 5 ℃ / s, the AgCuNiPr alloy powder is dried and then sieved with a sieve to obtain AgCuNiPr alloy powder with an average particle size of 4.9μm; the ingot is formed by 80Mpa cold isostatic pressing, and the ingot product is placed in a pure hydrogen atmosphere. After sintering at 800°C for 3 hours, extrusion was performed at a heating temperature of 580°C and an extrusion ratio of 60. After extrusion, the silver alloy was subjected to a rolling deformation of 75% and an annealing temperature of 330°C. After several times of large deformation rolling and annealing treatment, the AgCuNiPr alloy strip is made. The grain size of the AgCuNiPr alloy strip reaches 1.4μm. Then, the AgCuNiPr is heated at 600℃ and the deformation is 35% by the hot rolling composite process. The alloy ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
crystal sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
crystal sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an ultra-fine grain silver alloy laminar composite which comprises a working layer and a base layer, wherein the working layer is made of AgCuNiRe alloy; the base layer is made of copper or copper alloy; the working layer is compounded on the base layer to form a laminar composite. The invention has the improvement that in the laminar composite, the mean grain size of the AgCuNiRe alloy is smaller than or equal to 0.5 microns. The invention has the benefits that the wear resistance of the AgCuNiRe layer is improved, and the service life of a micromotor is prolonged indirectly; and no new substances are required to be added in the existing alloy in the improvement, and the ultra-fine grain silver alloy laminar composite can be prepared by an existing conventional process, so that the cost is low, and the application range is wide.

Description

Technical field [0001] The invention relates to a layered composite material for manufacturing a commutator of a micro-motor, in particular to a layered composite material of an ultrafine grained silver alloy and a manufacturing method. Background technique [0002] In the working process of the DC micromotor, the commutator and the brushes are in contact with each other and slide relative to each other to realize the transmission of current and keep the motor running; during the working process of the equipment, there is inevitably sliding between the commutator and the brushes Friction and wear, the resulting wear debris is squeezed between the commutator and the brush, which affects the contact performance of the two, resulting in large contact resistance fluctuations, resulting in poor output waveforms and electrical noise, and even in severe cases. Causes non-commutation arc and accelerates material damage; at the same time, wear debris is welded to the commutator groove und...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B37/10C22C5/08C22F1/14
Inventor 章应徐永红
Owner CHONGQING CHUANYI AUTOMATION